#1436 - ALUMINUM HEAT SINK HEAD (PURPLE/11FIN)

NITRO STAR 21BB S-25/Please tighten head screws equally.

Aluminum Heat Sink Head for the Nitro Star 21 BB engine! This heat
sink head will also fit similar engines that use the same
underhead. This 11 fin machined aluminum head not only looks great,
it is more durable and keeps the engine cooler for higher
performance! Packaged with four head bolts and convenient Allen
wrench.